Single Choice

Which of the following statements is not correct regarding colchicine?

AIt prevents assembly of microtubules
BIt inhibits chromosome replication
Correct Answer
CIt is an alkaloid
DIt is called as mitotic poison

Solution

Colchicine is an alkaloid widely used in plant breeding for doubling the chromosome number. The alkaloid does not allow the formation of spindle because it prevents assembly of microtubules. It is therefore called 'mitotic poison'. Colchicine holds the cells in metaphase. Colchicine does not inhibit chromosomes replication.
So, the correct answer is 'It inhibits chromosome replication'.

SIMILAR QUESTIONS

Cells - The Unit of Life

Colchicine is a cell poison which arrests cell division at _____ and can induce_____.

Cells - The Unit of Life

Match column I with column II and select the correct option from the given codes. Sr.no List I Sr.no List II A. Disintegration of nuclear membrane 1. Anaphase B. Appearance of nucleolus 2. Prophase C. Division of centomere 3. Telophase D. Replication of DNA 4. S- phase

Cells - The Unit of Life

Select the correct statement with respect to mitosis.

Cells - The Unit of Life

Beads on string like structures of A are seen in B, which further condense to form chromosomes in C stage of cell division. Identify 'A', 'B' and 'C'

Cells - The Unit of Life

The following are stages in the cell division in plants 1. Anaphase 2. Prophase 3. Telophase 4. Metaphase What is their correct sequence?

Cells - The Unit of Life

Which of the following stage of mitosis is represented in the above diagram?

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